docs: def modifyReject(LowLayerCompatibility_presence=0,
                   HighLayerCompatibility_presence=0):
      """MODIFY REJECT Section 9.3.15"""
      a = TpPd(pd=0x3)
      b = MessageType(mesType=0x13)  # 00010011
      c = BearerCapability()
      d = Cause()
      packet = a / b / c / d
      if LowLayerCompatibility_presence is 1:
          e = LowLayerCompatibilityHdr(ieiLLC=0x7C, eightBitLLC=0x0)
          packet = packet / e
      if HighLayerCompatibility_presence is 1:
          f = HighLayerCompatibilityHdr(ieiHLC=0x7D, eightBitHLC=0x0)
          packet = packet / f
      return packet